<?php

/**
 * UserIdentity represents the data needed to identity a user.
 * It contains the authentication method that checks if the provided
 * data can identity the user.
 */
class UserIdentity extends CUserIdentity
{
	/**
	 * Authenticates a user.
	 * The example implementation makes sure if the username and password
	 * are both 'demo'.
	 * In practical applications, this should be changed to authenticate
	 * against some persistent user identity storage (e.g. database).
	 * @return boolean whether authentication succeeds.
	 */
	 private $_id;
	        public function authenticate(){

	                 // Understand that email === username
	                $username=strtolower($this->username);
	                $user=Employee::model()->find('LOWER(employee_username)=?',array($username));
	                if ($user === null){
	                        $this->errorCode=self::ERROR_USERNAME_INVALID;
	                }else if ($user->employee_password !== hash_hmac('sha256', $this->password,
	                Yii::app()->params['encryptionKey'])){
                        $this->errorCode=self::ERROR_PASSWORD_INVALID;
	                }else{
	                        $this->errorCode=self::ERROR_NONE;
	                        $this->setState('type', $user->employee_usertype);
                        $this->_id = $user->id;
                }
                return !$this->errorCode;
	        }
	
	        public function getId(){
	                return $this->_id;
	        }
		}